Wire drawing apparatus



Sept. 17, 1940. E. D..TUBBS V WIRE DRAWING APPARATUS Filed Aug.- 12, 1939 2 Sheets-Sheet 1 -INVEN' I'OR Ear/2. 727%:

ATTORNEY E. Df'ruBBs WIRE DRAWING APPARATUS v Filed Augf 12, 1939 2 Sheets-Sheet 2 INVENTOR ATTORNEY Patented Sept. 17, 1 940 EPATENT OFFICE WIRE DRAWING APPARATUS Earl D. Tubbs, New York, N. Y., assignor to Igoe Brothers, Inc., Newark, N. J.

Application August 12, 1939, Serial No. 289,739

Claims.

" This invention relates to the slip ring shoes used in the wire drawing process as set forth in Patent No. 2,124,967, wherein the wire that is reduced by drawing through a die is wrapped about I a primary drum and upon further reduction, through another die, is coiled upon a secondary drum--all according to usual practice.

The series of slip shoes, upon which the wire is wrapped with several turns about their lower peripheral portions, soon become worn with grooves formed by the wire due tothe slipping action thereof, and then it is necessary to reverse the slip shoes so that the ungrooved peripheral portions of the shoes may present the bearing surface for the wire turns.

Heretofore this reversing operation consumed considerable time in its performance, necessitating the disconnection of the relatively weighty coil receiving drum and hoisting it clear from the primary drum, to thus permit access to the slip shoes for their reversal or removal. When said shoes are completely worn they are to be resurfaced and replaced.

Therefore my improvement consists in the provision of a segmental block that is bolted to the secondary drum, "at one side thereof, and in its bolted position engages an adjacent shoe of the series to thus lock the series of shoes in the groove provided therefor on the primary drum. For shoe removal purposes it is only necessary to release the segmental locking block, whereupon the shoes, which can he slid about the drum, can be separately removed, either for reversal or renewal.

Other features and advantages of my invention will hereinafter appear.

In the drawings- Figure l is a diagrammatic view showing the generalarrangement of my improved wire draw- 40 ing apparatus.

Fig. 2 is a sectional elevation through the drums.

Fig. 3 is a bottom view of Fig. 2.

Fig. 4 is a section on the line 4-4 of Fig. 2.

Fig, 5 is a section on the line 55 of Fig. 4, and

Fig. 6 is a detail view of the removable locking member and a shoe in position for removal.

In said views let I indicate the primary drum which receives wire 2 from the die 3, while 4 indicates a pulley from which the reduced wire is further reduced through die 5 and passes thence to the coiling or secondary drum 6.

The drums I and 6 are mounted on a vertical, driven shaft I and are connected together as by the bolts 8 passed through their webs.

The flange or peripheral wall 9 of drum I is recessed annularly to contain the slip shoes, said shoes being indicated at I2, the recess being bounded, top and bottom, by the horizontal drum extensions In Which each have the inwardly turned, opposed lips II, for a purposeto be referred to hereinafter.

Fitting within the drum recess are a series of segmental slip ring shoes I2, four of these shoes. being here illustrated by way of example. These shoes are backed by a packing I3 of suitable resilient material that lies between said shoes and the wall 9 and enables said shoes to yield inwardly under excessive pull of the wire, whereupon the turns of the wire on this drum may slip to compensate for the difference between the respective wire strains upon the two drums. So that the shoes I2 may be able to have this inward movement the shoe segments are spaced apart at their opposed ends, the spacing being indicated at It.

The shoes I2 each have a recess I5 formed therein to receive the wire turns, and they have upper and lower extensions IE to lie behind the lips I I and thus to be retained within the boundaries of the drum provided by said lips.

As means for releasably locking the shoes upon the drum I provide a segmental block or member II, removablyv connected to drum 6 as by bolts I3 and having a depending lip I9 that normally coacts with the upper extension I6 of a shoe, for shoe retaining purposes. Thisblock I'I fits within a clearance in the drum I to complete the circumferential extent thereof, and is removable upon releasing bolts I8. The under surface of drum 6 is given a clearance at 20 for the removal pas sage of the block. In Fig. 6 the block I! is shown as thus removed, leaving the way clear for the shoe tobe lifted above the lower lip II and removed from the drum.

By sliding the shoes around the drum they may be successively removed through the space left vacant by the removed block I'I.

As set forth in said Patent No. 2,124,967, the function of the slip shoes is to prevent removal of the coating from the wire being drawn and thus to avoid scratching of the wire.

By the present invention much labor and time are saved, the operation of changing the shoes is facilitated, and the machine need be out of service only for a relatively brief period. t

Variations within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim:

1. In wire drawing apparatus including a primary drum and a wire coiling drum, segmental slip shoes placed about said primary drum, means upon said drum for retaining said shoes thereon, and a removable segmental lock member forming part of said retaining means, the removal of said segmental lock member permitting the release of said shoes.

2. In wire drawing apparatus including a primary drum and a wire coiling drum imposed on said primary drum, said primary drum having a peripheral recess, segmental slip shoes placed in said recess and adapted to yield inwardly under the pull strain of wire wound thereabout, said Wire coiling drum having a segmental clearance at its under surface and said primary drum having a coincident clearance, together witha segmental lock member removably secured to said wire coiling drum and fitting said clearances to normally retain said shoes, the removal-of said lock member permitting release of said shoes,

3. In a wire drawing drum, segmental slip shoes placed about said drum, means upon said drum for retaining said shoes thereon, and a removable segmental lock member forming part of said retaining means, the removal of said segmental lock member permitting the release of said shoes.

2,215,235 g I :l I l '1 4. In wire drawing apparatus including a primary drum and a wire coiling drum, a plurality of segmental slip shoes placed about said primary drum, means upon said drum for retaining said shoes thereon, and a single removable segmental lock member of equal circumferential length to any one of said segmental slip shoes forming part of said retaining means, the re moval of said segmental lock member permitting the release of said slip shoes one at 'a tim'e.

5. In a wire drawing apparatus including a primary drum and a wire coiling drum imposed on said primary drum, said primary drum having a peripheral recess, segmental slip shoes placed in said recess and adapted to yield inwardly under the pull strain of wire wound thereabout, a segmental lock member removably secured to said wire coiling drum in position extending therefrom in engagement with said slip shoes to normally retain said slip shoes in position about said primary drum, the removal of said lock member permitting release of said shoes.

EARL D. TUBES. 

